Burnproof device of triple/double switch combination faucet

Abstract

A burnproof device of triple/double switch combination faucet, including a faucet main body having an L-shaped cold water inlet switch seat and an L-shaped hot water inlet switch seat on two sides. A communicating tube inward extends from the side of each of the cold and hot water inlet switch seats. A center of the main body is disposed with a controlling switch seat for controlling the discharging of the water from downward spout or upward sprinkler. The communicating tube communicates the cold and hot water inlet switch seats with the controlling switch seat. A switch is disposed at a transverse tube opening of each of the cold and hot water inlet switch seats for controlling the water to flow from the longitudinal inlet into the center of the main body and mix therein. The controlling switch of the controlling switch seat is used to control whether the water should be discharged from the spout or the sprinkler. The center of the communicating tube of the hot water switch seat is formed with a longitudinal circular water pipe seat. A bypass passage is disposed between the communicating tube of the cold water switch seat and the central controlling switch seat. The water is bypassed to rear side of the controlling switch seat to connect with the water pipe seat. A burnproof water pipe composed of an outer and an inner fitting pipes is fitted in the water pipe seat.

What is claimed is: 
     
       1. A burnproof device of triple/double switch combination faucet, comprising a faucet main body including an L-shaped cold water inlet switch seat and an L-shaped hot water inlet switch seat on two sides, a communicating tube inward extending from the side of each of the cold and hot water inlet switch seats, a center of the main body being disposed with a controlling switch seat for controlling the discharging of the water from downward spout or upward sprinkler, the communicating tube communicating the cold and hot water inlet switch seats with the controlling switch seat, a switch being disposed at a transverse tube opening of each of the cold and hot water inlet switch seats for controlling the water to flow from the longitudinal inlet into the center of the main body and mix therein, the controlling switch of the controlling switch seat being used to control whether the water should be discharged from the spout or the sprinkler, the center of the communicating tube of the hot water switch seat being formed with a longitudinal circular water pipe seat, a bypass passage being disposed between the communicating tube of the cold water switch seat and the central controlling switch seat, the water being bypassed to rear side of the controlling switch seat to connect with the water pipe seat, a burnproof water pipe composed of an outer and an inner fitting pipes being fitted in the water pipe seat, the middle section of the interior of the water pipe seat being disposed with a water sealing fitting section, the inner wall thereof being watertightly fitted with a burnproof water sealing pipe having a water sealing ring, an upper and a lower shallow annular grooves being formed between the upper and lower sides of the water sealing fitting section for watertightly engaging with the water sealing rings fitted around the burnproof water sealing pipe, the upper annular groove being communicated with the bypass passage on rear side of the controlling switch seat, the outer wall of the water pipe seat being formed with an upper water outlet above the upper annular groove, the communicating tube of the hot water switch seat being communicated with the section between the lower annular groove and the water sealing fitting section, a stopper plate being disposed on the water pipe seat below the lower annular groove for preventing the inner fitting pipe of the burnproof water sealing pipe from dropping to the bottom of the water pipe seat, the wall of the lower annular groove near the controlling switch seat being disposed with a lower water outlet, the upper and lower water outlets of the water pipe seat being communicated with the communicating tube, the upper end opening of the water pipe seat being formed with inner thread in which a clog body is screwed, the clog body being formed with a water outlet hole on lower section and a stepped edge on inner side for abutting against the outer fitting pipe of the burnproof water sealing pipe and preventing the inner fitting pipe from being excessively upward flushed to the top of the clog body, three water sealing rings being respectively fitted in fitting grooves of upper, middle and lower sections of the outer fitting pipe of the burnproof water sealing pipe, the inner walls between the three water sealing rings being formed with circumferential slots at intervals, the center of the interior of the inner fitting pipe being disposed with a diaphragm, the walls of upper and lower sides of the diaphragm being also formed with circumferential slots at intervals, the outer and inner fitting pipes being fitted with each other and then longitudinally installed into the water pipe seat with the circumferential slots of the outer and inner fitting pipes respectively aligned with the upper and lower annular grooves of the water sealing fitting section, whereby when the water pressures of the incoming water from two sides are equal to each other, the opposite slots of the inner and outer fitting pipes permit the cold and hot water to evenly respectively flow from the upper and lower slots into the inner fitting pipe and be isolated by the diaphragm and kept in a balanced state, the cold and hot waters then respectively flow out of the upper and lower end openings of the inner fitting pipe and the upper and lower water outlets of the water pipe seat to be mixed in the communicating tube on outer side of the water pipe seat, and then the water goes into the controlling switch seat and switched by the controlling switch to flow upward to the sprinkler or downward to the spout, while in the case that the cold water pressure is reduced to be less than that of the hot water, the diaphragm of the inner fitting pipe is upward pushed away from the symmetrical position by the hot water pressure, whereby the slots of the inner and outer fitting pipes are disaligned from each other, preventing the hot water from further going into the inner fitting pipe, at this time, only the cold water flowing out from the upper end opening of the inner fitting pipe and the upper water outlet of the water pipe seat to the communicating tube on outer side of the water pipe seat so as to protect the user from being burned by the hot water.